Malicious PDF — malware analysis report

Static analysis result for SHA-256 6995618f2dd51633…

MALICIOUS

PDF

84.6 KB Created: 2021-07-27 17:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 77fe5bcf4f7c36be04f706a0aeab2d23 SHA-1: cbdedb79775c4bd4da71a875cb1e26200cc7d36b SHA-256: 6995618f2dd51633da967917ba8dd35467c31a688d4f11938e9d0897a3d3dd02
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are likely used to redirect victims to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://h1t-url12shio-turbo.com/contents//files/95649920033.pdf In PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/tatonume.pdfIn PDF document text
    • https://angkagenap.com/contents//files/bijijib.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/4719d0ffb9997d8c91de1738c152f5c7/89052472757.pdfIn PDF document text
    • http://foodsaver.nl/app/webroot/files/userfiles/files/jivini.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/29648855753.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/3koo305j7e59rkebgc4803u25v/rabusafin.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/05b5f7cb2e341e9abfdb6b257a0ecaa0/90987449104.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/39545370662.pdfIn PDF document text
    • http://myphamasia.net/upload/files/zubita.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/nemodirarukuwomoz.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/73885611378.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ee2d17daf0b---ledolonadiwuroku.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/49645191893.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/39911547409.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/61602192321.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096cafe9a9d9---vexowumisuxusinuzurevata.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160a46b47789cf---zuzizu.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/mopokupon.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/d5e95b265eed38cffb1a9cc91f5ba119/18900100490.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088327700180---nadutefimawaruzezamuda.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcbae17633---xevopikizuko.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/50149899593.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/kj314o902k0fdlg2sf9k9ccppf/24295973854.pdfIn PDF document text
    • https://pharmalogindia.in/ckfinder/userfiles/files/25740028521.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=update+software+samsung+s6+edge+plusPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AC 18084 bytes
SHA-256: b9df0f473bfb58dd27d788dc3e0905a151c6114dd294d155efd247fcfd7c1752
font_01_sfnt_off00011276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11276 11108 bytes
SHA-256: 748be64c37d7238b71fb88ee8a661a6f93852a93b04e7a0649edf8882915cb82
font_02_sfnt_off00012c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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